mirror of
https://dev.lirent.ru/Vatrog/vm-automation-signaling.git
synced 2026-06-20 19:06:37 +03:00
lirent
709f4b586a
An epoll-driven, neutral transfer-event bus that connects sensors and input actuators to one or more controls, bidirectionally. It owns the transfer context and events — delivery order, priority, protocol-level timing, and an interrupt-driven event model over fd sources (eventfd/timerfd/sockets) — and stays agnostic to both the sensor/input drivers and the control. What lives here: - memctx: a coherent address-space context per endpoint — the guest address-space root paired with a pre-opened read-only RAM-region fd, with per-endpoint epoch invalidation and retained replay to late subscribers. Perception lives in out-of-tree sensor libraries that consume this datum read-only. - exclusive-ownership leases for destructive resource classes (input, power, memory-write). - write-signaled memory writes (MEMWRITE): an atomic write to guest memory routed through the seam under an exclusive lease, never a writable mapping. - a host-management seam for VM lifecycle/status and a neutral input-injection command path. - multi-VM endpoints; capability-gated, audited control authorization over an in-process or unix-socket transport. Builds against headers only by default (a stub mode that exercises the seam without a VM); armed builds link the real sensor/input libraries behind flags. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
#ifndef VMSIG_SOCKET_H
|
|
#define VMSIG_SOCKET_H
|
|
#include "vmsig_event.h"
|
|
#include "vmsig_control.h" /* vmsig_grant */
|
|
#include "vmsig_core.h" /* vmsig_core */
|
|
|
|
/* vmsig_socket.h — out-of-process control over a unix socket (human/service poller).
|
|
* signaling LISTENS; each accepted connection is authenticated (SO_PEERCRED) and,
|
|
* per policy, receives a grant -> becomes a distinct control behind the same seam. */
|
|
|
|
/* Wire format: fixed-size, pointer-free — the same contract on the external
|
|
* poller. Single host (unix socket) => native byte order. Only the event's
|
|
* inline part is serialized (payload pointers do not go on the wire). */
|
|
#define VMSIG_WIRE_MAGIC 0x47495356u /* 'VSIG' */
|
|
#define VMSIG_WIRE_VERSION 1u
|
|
typedef struct {
|
|
uint32_t magic;
|
|
uint32_t version;
|
|
uint32_t kind; /* vmsig_kind */
|
|
uint32_t source; /* vmsig_source */
|
|
uint32_t dir; /* vmsig_dir */
|
|
uint32_t prio; /* vmsig_prio */
|
|
uint32_t endpoint;
|
|
uint32_t corr;
|
|
uint8_t inln[48]; /* inline event payload */
|
|
} vmsig_wire;
|
|
|
|
/* Frame <-> event codec (for external clients too). */
|
|
void vmsig_wire_encode(vmsig_wire* w, const vmsig_event* ev);
|
|
int vmsig_wire_decode(const vmsig_wire* w, vmsig_event* ev); /* 0 ok, -1 bad magic/ver */
|
|
|
|
/* Admission policy: given the authenticated peer (SO_PEERCRED), return a grant.
|
|
* An empty grant (cap_mask==0 || endpoint_mask==0) => connection is rejected. */
|
|
typedef vmsig_grant (*vmsig_socket_policy)(uint32_t uid, uint32_t pid, void* ud);
|
|
|
|
/* Bring up a unix-socket control listener on `path` (prefix '@' => abstract socket).
|
|
* Driven by the epoll core: accept -> SO_PEERCRED -> policy -> grant -> per-conn
|
|
* control. Returns 0/-1. */
|
|
int vmsig_socket_attach(vmsig_core* core, const char* path,
|
|
vmsig_socket_policy policy, void* ud);
|
|
|
|
#endif /* VMSIG_SOCKET_H */
|